GeForce 9800 GT 1GB vs Geforce GTX 780

Intro

Compare those specs to the Geforce GTX 780, which features a clock speed of 863 MHz and a GDDR5 memory frequency of 1502 MHz. It also uses a 384-bit bus, and uses a 28 nm design. It is made up of 2304 SPUs, 192 Texture Address Units, and 48 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 1GB		105 Watts
Geforce GTX 780		250 Watts
	Difference: 145 Watts (138%)

Memory Bandwidth

The Geforce GTX 780 should in theory be much faster than the GeForce 9800 GT 1GB in general. (explain)

Geforce GTX 780		288384 MB/sec
GeForce 9800 GT 1GB		57600 MB/sec
	Difference: 230784 (401%)

Texel Rate

The Geforce GTX 780 is a lot (more or less 393%) better at AF than the GeForce 9800 GT 1GB. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce 9800 GT 1GB		33600 Mtexels/sec
	Difference: 132096 (393%)

Pixel Rate

If running with a high resolution is important to you, then the Geforce GTX 780 is superior to the GeForce 9800 GT 1GB, by far. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce 9800 GT 1GB		9600 Mpixels/sec
	Difference: 31824 (332%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.